Home / 19,867.72-27,420.08-12,814.64

Finding the Fourth Proportional to 19,867.72, 27,420.08 and 12,814.64

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Solution

The fourth proportional to 19,867.72, 27,420.08 and 12,814.64 is: 17,685.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,867.72 : 27,420.08 = 12,814.64 : x
  2. Step 2: Convert to fraction form
    19,867.72/27,420.08 = 12,814.64/x
  3. Step 3: Cross multiply
    19,867.72x = 27,420.08 × 12,814.64
  4. Step 4: Simplify right side
    19,867.72x = 351,378,458.45
  5. Step 5: Solve for x
    x = 351,378,458.45/19,867.72
  6. Step 6: Final answer
    x = 17,685.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.